Icebox / Tank (single fresh fish storage)

[darkly77]

Suggestion: A small storage space to keep fish fresh. Intended to hold fish needed for quest. Fish in this space are ignored when bulk selling fish. For balance, it can only hold a single fish. Both suggestions below fill the same need. This could be a minor feature, or an upgradable one.

Ice Box
Small cold storage box filled with ice. Keeps a fish fresh for twice as long. Can only hold 1 fish at once,

Water Tank
Old and worn out, but works well enough to keep a single fish alive.

It would still be useful beyond quests, giving you a special place to hold a trophy or aberrant fish. But it could have balance issues, and may just feel like an extended storage, perhaps even a minor annoyance as it detracts from your main storage. Figured I'd raise it anyway as the concept is still interesting.